“The Borders of the Black Sea with Ser Robert Ker Porter’s Route through Constantinople, Bulgaria, Valachia, Moldavia, &c,” plate LXXXIII, map by Ser Robert Ker Porter

Travels in Georgia, Armenia, Ancient Babylonia, &c. &c. During the Years 1817, 1818, 1819, and 1820.

London: Longman, Hurst, Rees, Orme, and Brown, Paternoster-Row, 1821

Rare Book & Manuscript Library, Columbia University (P915.5 I)